Attachment for paper cutting machines



Oct. 31, 1933. w. M. REICHART 1,932,675

ATTACHMENT FOR PAPER CUTTING MACHINES Filed Dec. 21, 1951 I NVENTOR.

ZW/Zkwr W7. zany/ari ATTORNEYJ' Patented Oct. 31, 1933 ATTACHMENT FOR PAPER CUTTING MACHINES William M. Reichart, Cleveland, Ohio, assignor to The Chandler & Price Company, Cleveland, hio,'a corporation of Ohio Application December 21, 1931 Serial No. 582,306

9 Claims. (01. 164-59) particularly to a novel side guide for such machines.

In paper cutting machines of thetype herein described, the knife bar which supports the knife,

is mounted to slide in spaced housings, and

opening of sufficient width and depth is provided in one of the housings to permit the knife, in

its descent during a cutting stroke, to move laterally into this opening. 7

When cutting from a stack of paper,- a pack which is of less width than the opening in the housing, or which is only slightly Wider than 1 such opening, there is a tendency of the knife,

in its lateral movement, to force or pull the pack of paper into the opening, thus marring, the

paper.

It is a primary object of the invention to pro- 29 vide a device which may be easily attached to a paper cutting machine, which will serve as an abutment or guide for a pack of paper which is to be cut from a stack clamped in the machine and which will also serve to prevent the pack of paper from being forced orpulled into the opening in the housing of the machine during the cutting stroke of the knife. To the accomplishment of the foregoing and related ends, said invention, then, consists of the means here- 39 inafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such disclosed means "constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawing:

Fig. 1 is a perspective view of a portion of a 4 jpaper cutting machine having the device of the present invention secured thereto; Fig. 2 is a view partly in elevation and partly in section, of the device, as seen from the left side of Fig. 1; Fig. 3 is a view similar to Fig. 2, but showing the i g position of the guide plate at the end of the descent of the knife; Fig. 4 is an end view of the device, as seen from the right side of Fig. 2; Fig. 5 is a cross-sectional view through the device, taken on the line 55 of Fig. 2; and

S'OfjFig. 6 is a View similar to Fig. 4, but showing a modification of the guide plate retaining means.

Referring to that form of the invention shown in Figs. 1 to 5, it will be seen that the machine includes a table 1, at the sides of which are 5 Ivertically extending housings 2 having therein slots or openings 3 in which-the knife bar 4 and knife 5, supported thereby, slide. The machine" is also provided with theusual vertically movable clamping bar 6, which serves to clamp the stack of paper to the table 1 during the cutting co stroke of the knife.

Secured to that side of the table towards which the knife moves laterally in its cutting stroke, and adjacent the opening in the housing, is the device of the present invention which includes a 5 plate support 7, the inner face of which is suitably recessed to receive a slidable guide plate 8, adapted to slide longitudinally of the machine.

As shown in Fig. 2, the rear portion of the plate 8 normally covers the opening 3 in the housing and serves as an abutment for the pack of paper which is to be cut from the stack of paper clamped to the table by the clamping bar 6. The plate 8 is maintained in the position shown in'Fig. 2 by means of a coil spring 9, one end of which is secured as by a pin 10 to the plate support .7, and the other end of which is secured as by a pin 11 to the guide plate 8. The pin 11 extends through a bar 12 which is adapted to slide in a recess 13 in the support '7. A lock- 0 ing lever 14 is pivotally secured to the slide bar 12.

The operation of the device will now be readily understood. With the guide plate in theposition shown in Fig. 2, the stack of paper is clamped to 5; the table, with the side of the pack to be out therefrom in abutment with the guide plate.

The knife bar 4 and knife 5 are then caused to descend to cut the pack of paper, and in the final stages of the descent, the bar and knife strike the beveled upper edge of the plate 8 and move it to the position shown in Fig. 3, the knife at the same time moving laterally into the opening 3 in the housing 2.

The portion of the plate 8 which covers the opening in the housing thus serves as a guide or abutment for the pack of paper during the cutting stroke of the knife, thereby preventing the pack from being forced or pulled into the opening, but is automatically pushed out of the way as 109 the knife and knife bar descend to permit the lateral movement of the latter into said opening. Mutilation of the pack of paper is thus prevented. When the knife and knife bar are lifted, the spring 9 causes the plate 8 to assume its normal position as shown in Fig. 2.

When it is desired to employ the plate 8 as an ordinary side guide for the machine, the plate may be locked in the position shown in Fig. 3, by si ply turning the lever 14 upward against the no support 7, as indicated by the dotted lines in Fig. 2.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention:

1. In combination with a paper .cut'ting machine having a housing provided with an opening adapted to receive the knife of the machine in its descent during the cutting stroke, an attachment for said machine normally covering a portion of said opening and adapted to be moved to uncover the opening during the cutting strokeof the knife."

2. In combination with a paper cutting machine having a housing provided with an openin adapted to receive the knife of the machine in its descent during the cutting stroke, an attachment for said machine comprising a support adapted to be secured to the table of the machine and a platesecured to said support having a portion adapted to cover part of the opening in the housing. 7

3. In combination with a paper cutting machine having a housing provided with an openin: adapted to receive the knife of the machine in its descent during the cutting stroke, an attachment for said machine comprising a support adapted to be secured to the table of the machine and a slidableplate secured to said support having a portion adapted to cover partof the opening in the housing and to be moved to uncover the opening during the cutting stroke of the knife.

4. In combination with a paper cutting machine having a housing provided with an opening adapted toreceive the knife of the machine in its descent during the cutting stroke, an attachment for. said machine comprising ;a support adapted to be-secured to the table of the machine and a slidable plate onsaid support having a portiun adapted to cover part of the opening in the housing and a beveled edge adapted to be engaged by the knife and knife bar during the cutting stroke to uncover the opening in the housing.

5. An attachment for paper cutting machines comprising a support adapted to be secured to the table of said machine, a slidable guide plate secured to said support having a beveled portion normally projecting from the support and means for maintaining the guide plate in its normal position.

=6. In combination with a paper-cutting machine having a housing provided with an opening adapted to receive the knife of the machine int-its descent during the cutting stroke, means adapted to normallycover a portion of said opening, and means in common operating the knife and movingsaid cover-means.

7; In combination with a paper-cutting machine having a housing provided with an opening adapted to receive the knife of the machine in its descent during the cutting stroke means adapted to normally cover a portion of said opening, means in common operating the knife and moving said cover-means, and means for optionally preventing said operating means from moving said cover-means.

8. In combination with a paper-cutting machine, a slidable guide plate movable to two extreme positions, means moving said guide plate in one of said positions when the knife moves, and means for locking the plate in the other =01 said positions.

9. In combination with a paper-cutting machine having a housing provided with an opening adapted to receive the knife of the machine in its descent during the cutting stroke, a slidable guide plate movable to cover part of the opening inthe housing, means moving said guide plate from said opening when the knife moves, and means for optionally "locking the plate in such un-cover position.

WILLIAM M. REICHART. 

